Category System Design

Introduction In microservices architectures, ensuring system resilience is critical to maintain high availability (e.g., 99.999% uptime) and handle failures gracefully under high load (e.g., 1M req/s). Resiliency patterns such as Circuit Breaker, Bulkhead, Retry, and Timeout address these challenges by…

Introduction In microservices architectures, auxiliary design patterns such as the Sidecar, Ambassador, and Adapter Patterns enhance service functionality by offloading cross-cutting concerns, simplifying external integrations, and adapting interfaces, respectively. These patterns address challenges like scalability (e.g., 1M req/s), resilience (e.g.,…

Introduction The Strangler Fig Pattern is a strategic approach for incrementally migrating a monolithic application to a microservices architecture by gradually replacing components of the monolith with microservices. Inspired by the strangler fig plant, which grows around a host tree…

Introduction In microservices architectures, managing distributed transactions across multiple services is a significant challenge due to the absence of traditional ACID (Atomicity, Consistency, Isolation, Durability) transactions provided by monolithic databases. The Saga Pattern addresses this by coordinating a series of…

Introduction In microservices architectures, managing service requests efficiently while maintaining scalability, security, and a seamless client experience is a critical challenge. The API Gateway and Aggregator Pattern are design patterns that address these challenges by providing a centralized entry point…

Introduction Domain-Driven Design (DDD) is a software development approach that emphasizes modeling software around the business domain, fostering close collaboration between technical and domain experts to create systems that are maintainable, scalable, and aligned with business needs. In microservices architectures,…

Introduction Testing microservices is a critical aspect of ensuring their reliability, scalability, and correctness in distributed systems. Unlike monolithic architectures, where a single codebase and database simplify testing, microservices introduce challenges due to their decentralized nature, independent deployments, and inter-service…

Introduction In distributed systems and microservices architectures, deploying updates without interrupting service—achieving zero-downtime deployments—is a critical requirement for maintaining high availability, user satisfaction, and business continuity. Traditional deployment methods, such as stopping the application, updating code, and restarting, introduce unacceptable…

Introduction In microservices architectures, managing workflows across multiple services is a critical challenge, particularly when ensuring data consistency, scalability, and loose coupling. Two primary approaches for coordinating distributed workflows are Service Orchestration and Service Choreography. Orchestration involves a central coordinator…